AI Article Synopsis
- The study focused on how internal surface treatments and margin locations affect microleakage in two types of alumina-reinforced ceramic crowns: In-Ceram and Procera, tested on human premolars.
- Full crowns were made with margins in both enamel and dentin, using two types of adhesives, and four different internal treatments were applied before measuring leakage.
- Results showed that crowns with dentin margins had more leakage than those with enamel margins, with Procera crowns leaking more than In-Ceram ones, while the combination of aluminum oxide blasting and silane treatment generally resulted in less microleakage.
Article Abstract
This study investigated the influence of internal surface treatment and margin location on the microleakage of 2 alumina-reinforced ceramic crown systems: In-Ceram (VITA Zahnfabrik) and Procera (Nobel Biocare). Full crowns were produced for each of the 2 systems (n = 24) in human premolars, with margins located in enamel and dentin, and luted with Single Bond and RelyX ARC (3M ESPE). Four internal ceramic treatments were tested: (1) aluminum oxide blasting (AO), (2) AO plus silane, (3) hydrofluoric acid etching (HF), and (4) HF plus silane. After thermal cycling, leakage was measured quantitatively. Statistical analysis (P < .05) showed higher leakage in dentin margins compared to enamel. In enamel, Procera showed greater leakage compared to In-Ceram. Generally, lower microleakage was observed for the AO plus silane treatment.
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